Pottery-forming machine



June 10, 1930. w, J, M|LLER 1,762,236

POTTERY FORMING MACHINE Filed Fen. 17, 1927 5 Sheets-Sheet 2 IN VEN TOR.

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ATTORNEY June 10, 1930. K w 1 M|L ER l 1,762,236

POTTERY FORMING MACHINE Filed Feb. 17, 1927 5 Sheets-Sheet 3 IN V EN TORT A TTORNEY .Patented June 10, 1.930.

UNITED STATES PATENT er1-*ICE WILLIAM :L MILLER, or s'WIssvALE, rENNsYLvANIA POTTERY-Femme mAeHIiIE Application filed February 17, 1927. Serial No. 168,994.

scribed.-

One of the objects of Iny invention is to 'produce a perfected automatic jigger and profile, in which the profile is operated from an overhead shaft or spindle, thereby eliminating sundry parts and simplfying theV construction of the machine.

Another object of my improvement is to provide in conjunction with -the structure just specified a means for periodically gradually retarding a turntable, which is employed for carrying molds, to bring it from a state of maximum rotary speed toa statel of rest, in carrying molds with material thereon into operative positlon under one or more profiles, then to lock said turntable in position under said profiles' until the operation of profiling is`A completed, andv then graduallyaccelerating said turntablev again, to bring it'from a' state-of rest to a state of maximum velocity again, in remov ing or carrying away the molds from under sai-d profiles.

' Another object of my impro-vement isto provide' a means for automatically moving the shaping tools of myy pottery forming machine horizontally as Well as vertically intoy operative position, where used in the manufacture of undercut ware.

Another object of my improvement is- -to provide' a means for automatically feeding materialto a number .of molds at the` same time and performing the same preliminary to having it finally shaped by .multiple profiles.

A further object .of my improvement is -to providel delicate adjustments for the sundry motions of the various j parts of my machine, to apply to Ware o different sizes and shapes.

A still further object of my improvement is--to vprovide a mechanismv for simultaneously shaping material on a number of molds, thereby increasing production and reducing expense of attendance.-

drawings, or by any mechanical equivalent j or obvious modification of the same.

In the drawings Fig. 1 is a fragmentaryk front elevation of my machine, showing some parts in cross-section; Fig. 2 is a fragmentary plan View of the same, on a somewhat larger scale, on the line 2-2 of Fig. 1.

Fig. 3 is an end View on the line 3-3 of Fig. 1; Fig. 4 is a detail on a larger scale of a modification of a part of my machine, which is\ shown in Fig. 1, on the line 4-4 of Fig. 1; Fig. 5 is another modification of the same detail.

Fig. 6 is a detail in elevation of a brake `operating device for the horizontal friction gears of jigger spindles, which are hereinafter described. f

Like numeralsy refer to like out the several views;

11y designates the base of my machine, and 12 the frame, which is mounted on and securedto said base 11.

parts through- Jigger supports 13 are adjustably secured to said base 11 by means of flanges 14 at their lower ends, and they have formed integrally therewith pivot bearings 15, for the lower ends of vertical spindles 16, which telescope into and are in spline sliding engagement with jigger spindles 16, which are shown in Figs. l and 3 as havin thereon necks 17, for the forked ends of yo es 18 to be. connected thereto.' d

The yokes 18 are adjustably connected to pitmen 21 by means of nuts19 and threads 2O on said pitmen 21, which are pivotally connected to levers 22 vat one end of the latter and slidably connected to extensions 13a of said jigger supports 13; rolls 23fare pivotally .connected to the other ends of said levers 22, and are in contact with cams 24, which are adjustably secured to shafts 25, which are shown in Fig. 1 as revolvably supported by bearings 26 and 26a.

The shafts 25 are operatively connected to each other by means of suitable sprockets or pulleys, preferably the former, and a flexible member 113, which may be either a chain or a belt, preferabl the former, and

are disposed in substantially radial and se-'- cant lines or directions with relation to said turntable.

The'series of openings 100, which is disposed in a secant line in each group of 4 openings on said turntable 30, is shownin Fig. 2 as parallel to the series in the same group, whichvis disposed in a radial line; but the two Vseries may be otherwise than parallel to eachother, if desired, and the radially disposed series of openings 100vmay also be disposed otherwise than in radial a lines, if desired.

T he term secant line is herein used vin the geometrical sense of being a line, which is otherwise than radial or .tangential with relation to said turntable 30.

' Said turntable 30 is shown in Fig. 1 as revolvably supported by a roller bearing 3l-32,'which is adjustably secured to ay centrally ,positionedpost 33; said bearing co'mprises an upper disc 31, which may be made in one with said turntable30, and a. lower disc 32, which is adjustably'scured to said post 33 by'I means of a hub '34.f.on said disc 32 and a set screw 35; thediscs'31and 32 form therebetween a raceway forballs 36 to roll therein. y

Rotation isimparted to said spindles 16 by means of horizontally disposedv friction gears 37, which are secured thereto and are in contact with adjustably positioned vertical friction gears 38 thereunder, which are in spline sliding engagement with high-speed sha-fts 39, which are revolvably lmounted in bearings 40, which are formed on-said' jigger supports 13, and pillow blocks 41, which are formed 'at the upper ends of eX- tensions 42 of said bearings 26.

Collars 51 are secured to said shafts 39 by means of suitable set screws, to prevent longitudinal displacement of said shafts 39; a stepped pulley 52 is also secured to the end of each of said shafts 39, for a belt, whereby it may be operatively connected to a motor` or other source of power; the pulleys 52 serve for varying and adjusting the speed of said-shafts 39.

The said gears 38 have tlfereon sleeves 43, which may. be made integral therewith, if

desired, and they may be shifted on said shafts 39 bv means of forked yokes 103,

which may be swivelledv on said sleeves 43, and screws 104, vwhich may be adjustably connected to said yokes 103v and secured to a boss13h on each of said jigger supports 13, thereby varying and adjustin nt e ve' locity of said spindles 16 and c ucks 28, as described in my co-pendingapplication for patent for Mechanism for producing intermittent rotation of a jigger spindle,

Serial 166,180, filed February 5, 1927, which has become Patent l#1,655,431, January 10th, 192s.

Each of the gears 37 may be intermittently retarded and brought to a state of rest by means of. a brake 107, which is actuated.

by the upperI end of the vertical arm of a bell crank lever 108, pivoted at 111, which has its horizontal arm under the pressurel of the lower end of a spring 109, which is shownv in Fig. 6 as abuttin at its upper end against the underside o theextension 13a of said jigger support 13.'

l 'A hook 110 is provided in the end of said horizontal arm, for being intercepted by a pin l112 in said pitman 21, thereby-releasing said brake 107 as described inmy last mentioned co-pending application.

The turntable 30 has an intermittent angular motion imparted thereto by means of a so-called Geneva drive, which contains a rotary member 44, which has thereon an arm 64 said member 44, together with the arm 64, is called the rotator; the arm 64 has a roll 45l pivotally connected thereto by means of a pin 61, as shown in Figs. l and 2; the roll 45 is in intermittent engagement With' the sides of radial slots 46, which are formed in a horizontal peripheral plate 62,

which is called a geneva, and which may be boltedto said table 30, or made integral therewith, if desired.

The plate 62 is alsoK shown in Fig. 2 as having in the periphery thereof concave partcircular cut-outs or indentations 63, to fit and mesh with the circular part of the main body of said member 44, during the intervals of ti'me when theroll 45 on the arm 64 of the latter is out of engagement with the sides of the slots .46 of vsaid plate 62, whereby the latter with the table 30 isv kept stationary.

The member 44 and arm 64 are preferably hollow and open on the sides of said arm 64, to permit thelparts of the periphery of said plate 62, which are adjacent to said slots 46, to pass therethrough during the interval of time when said plate 62 is rotated by said roll 45, as is hereinbefore described'. The member 44 has thereon a hub 47, whereby it may be adjustably secured to a vertical .shaft 48 by means of 'a suitable set screw, as shown in Fig. 1.

The shaft 48 is pivoted at the lower end thereof at 65 in said base 11, and it is shown as having secured thereto near the lowerq with another bevel end thereof a bevel gear 49, which is in mesh A ear on said e shaft 25, whereby said mem er 44 is rotated, thereby turning said turntable 30 in synchromism with the reciprocation of said jigger spindles 16 and the chucks 28 thereon. .v

. The vertical shaft 48. has also secured vthereto near the upper end thereof a horizontal bevel gear 53, which is in mesh with a vertical bevel gear 54, which is securedto one end of a spindle 55, which is revolvably supported'at said end thereof by means of a bearing 56, which is shown in Fig. 2 and is secured to an overhead brid e 57 by means of screws58., andV at the ot er endis parallel tosaid s indle the other end,

of said spindle 67 `1s journalled in .a block 68, whichforms an extension ofr'sa'ld bearing59.

A pair of pulleys or sprockets 69 and 70,

preferably sprockets, are secured to said spindles 55 and 67 .respectively gaged by a belt or lchain 71, preferably the latter, which serves 't0 transmlt motion from said spindle 55 to said spindle 67, as shown in Fig. 2. Pairs o f` recip1'ocable' supplemental frame unitsorzsupports 72, 73 and 74 for proiles and trimmers-,are slidably mounted on vertical suspension member'sf75, to reciprocate thereon, as is hereinaftermore fully described. J y

Said members 75 are'suspended from said bridge 57 and areadjustably secured in .position thereon by means of nuts 6 and lock nuts 77 which are shown as connected to the upper vends of said members 75, which pass through sockets 78l in said bridge 57.

Heads or stops 75a are provided on the lower ends of said members 75, to limit the lowest possible position thereon of said supports 72, 73 and 74, which are preferably l profi hollow and are arranged to` enclose said spindles 55 and 67, as shown in Figs. 3 and 4. Y

By varying and adjusting the position of said members 75 with relation to said bridge 1 57 the lowest possible position of said supports 72, 73 and 74 is thereby also varied and adjusted.

Profiles 79 are adjust-ably connected to said supports 72 and 74, and trimmers 80 are adjustably secured to said supports 73 by means of suitable bolts or screws, as shown in the drawings, to shape and trim the material on said molds )29, when the latter are raised from the turntable 80, and brought into operative position under said es and trimmers' by said reciprocating chucks 28, lwhich have rotation' imparted thereto by said gears 37 and 38, as hereinl Cams 81`and 82are adjustably secured to saidspindles 55 and 67 in contact with rolls 83, which are pivotally connected to levers 84 by means of pins 85, as shown in Fig. 3.

The' levers 84 are pivotally connected at one end thereof to one side of said sup orts 72, 73 and 74 by means of pins 86, an are abuttin at the other end thereof against the undersi e of screws 87, which are adjustably ositioned in the tops of said supports 72, A

3A and 74. These screws 87 may be adjusted while in o eration and while the driving connection su sists..

By lowering the 87 with relation to t e tops of said supports 72, 73 and 74, the latter are thereby caused to be' raised by said cams 81 and 82v to a higher elevation with relation to said-meinbers forv any position 'of said cams 81 and 82, and vice versa, thereby varying and adjusting while in operation and while the driving stroke of said sup orts, where the said stroke is not modified y the influence of said members 75, which are hereinbefore de-` connection subsists, lwhat may be called the altitude of reciprocation of said,

osition of said screws scribed,- and which limit the lowest possible position of said supports 72, 73 and 74.

By keeping said members 75 stationary and lowering said screws 87, a point will be reached when the supports 72, 73 and 74 will reciprocate without contacting with the heads or stops 75". The lowest `position of reciprocation of the'said supports may then be adjusted while in operation by adjusting said screws 87. Y

The highest position of said supports 72, 73 and 74 will always be affected by the manipulation of said screws 87, as hereinbefore described.

Springs 88 are interposed between the tops of said supports 72, and 74 and the underside of plates 105, which are shown as situated'. at the lower ends of adjusting screws 106 in said bridge 57, to reslliently press onand move said profiles and'trimmers vertically downwardly into-operative position, to shape and trim material on said molds 29, when said profiles and trimmers are allowed to descend during part of the revolution of said cams 81 and 82, thereupon to `be raised by the action of said cams 81 and 82 on said supports 72, 73 and 74during another part oflthe revolution of said cams, in opposition to the pressure of said springs 88.

lit)' saidV screws 106 and are further compressed during 4the upward motion ofvsaid supports,

and theyl are partl extended during A,the

downward motlon o the same.

The' initial pressure of said springs 88 on said supports `(2, 73 and 74 maybe regulated by varying and adjusting the position of' springs-88 may be adjusted by said screws In' the modification, shown in Fig. 4, one of said spindles 55'or 67 has adjustably secured thereto inside of a profile support 74, by means of a suitable set screw, a cam 89, which is in contact with a roll 90, which is pivotally connected to an oscillating arm 91; the .latter is pivotally connected at one end .thereof to a floating pivot block or .A bearing 92, and at the other end thereof by means of a pin 93 to a horizontal sliding i `bar 94, which is slidably connected to said body of the ware, which is inside, as shown in Fig. 5.

The floatlng pivot block or bearing 92- support 74a by means of guides or .sockets 98; said bar 94 has adjustably secured thereto pro'les 79a, for use `with undercut.

ware, in which the neck is narrower than the usually concave may be similarto the floating block, which is described in my co-pending application for patent for Multiple and automatic jiggers,

Serial No. 148,872, filed November 17, 1926,

except that thev said floating pivot bearing 92 is situated atthe end of the arm-91, in-

stead of in the intermediate part thereof,

' as in .my above co-pending application, and

it serves the same purpose, to4 wit: to vary and adjust while in operation and while the driving connection subsists the angle of oscillation of said lever 91, thereby varying and adjusting the stroke of said bar 94 with the profiles 79a thereon.' f

Acompressionspring 95 is abutting at on end. thereof against a plate 96, which is carried by a screw 97, which is adjustably secured to said support 74a, andw at `the other end thereof against said lever 91, thereby co-operating with said cam 89 in oscillating said lever 91, and it also provides a resilient application of and contact with the profiles 79a, which are shown as adjustably secured to said bar 94, and the material 102 in under cut ware molds 29a which are `shown in Fig. 5.

- A screw 114 is shown in Fig. 4 as adjustably engaged in a spur 115 at one end of said sliding bar 94, to be intercepted by said support 74, thereby adjustably limiting the those emplo ed aya navel of said bar 94 with said profiles 7e"- thereon on said support 74a. j

All the other parts connected to said support 74*1 may be substantially the same vas in connection with said supports 72 an U The support 7 4a may also be provided with a lug or flange 99, for adjustablysecuring4 thereto va profile-holding*- bracket 99, sec Fig. 5, for connecting thereto a profile 79, such as hereinbefore described, for use with Ware, which is not undercut.

Thel lug or ange 99 extends to the left of-said support 74a and 74, when the latter is in position in Fig. 1. l

The support 72, 73 and 74 may also be provided with brackets substantially similar to the brackets 99a, illustrated in Fig. 5 which may be situated nin adjacent front and rear supportsv as shown in Fig. 3, and serve to secure said front and rear supports to each other, when it is desired to actuate both supports by one and the same cam 82.

. In the modification shown in Fig. 5 the sliding bar 94 has connected thereto only .one undercut ware profile 792. and said bracket 99a hasfsecur'ed thereto a non-undercut ware prole 79, whereby the support 74'JL may be employed simultaneously to act on two molds, having different kinds of ware thereon.

The bearing block 68, one form of which is shown in plan view in Fig. 2, has thereon an .extension 68a in the form of a platform. which extends over some of the openings 100 in said turntable 30; molds 29 are supported in said openings 100, and combined feeders and preformers y101 are adjustably secured in position on saidplatform 68, to feed a charge of material 102 on to said molds 29, and preform it, preliminary to having said material 102 finally shaped by said profiles 79 and 79a.

Said combined feeders and preformers 101 may be such as are described in my co-pending application for patent for Method and meansffor feeding plastic material to molds, Serial No. 166,179 filed February 5, 1927 Said combined feeders and preformers 101 are shown in Fig. 2 as operatively connected to said spindle 67 by means of a bevel gear 116, which is adjustably ysecured to the lat ter, in mesh with a bevel gear 117 which is secured'to one end of a -hor'uontal spindle 118, which is revolvably supported in position over the inner end of said platform 68 by means-of bearings or pillow-blocks 119.

Another spindle 120 is revolvably su'pported in-position over the outer end of said platform 68a by means of bearings 119, and is operatively connected to said spindle 118 by means of a flexible member 121, which may be either a belt or a chain, preferably the latter, and is carried by suitable pulleys or sprockets, preferablythe latter.

invention may be used wi volvable spindles,

said supports and said levers,

gears 122 on ksaid spindles 1'1'8'and 120 are 1n mesh with horizontally 'disposed skew* bevel or spiral vgears 123, which are secured to the upperv ends off vertical spindles 124 on said combined feeders and preformers 101, thereby transmitting motion to the latter. Many changes may be made in the details of my machinewithout main scope of my invention and parts of my thout other parts.

I do not therefore restrict myself to the details as shown in the drawings; but I intend to include also all mechanical equiv'alents and obvious modifications of thesame within the scope of my invention.

I claim as my invention and desire to secure by Letters Patent:

1. In a pottery formin rier for supporting dmol thereon, one or more jiggers,

machine a, cars withv material situated thereunder, a means for actuating the same, onel or more verticall slidable supports for profiles, a horizonta ly slidable member on each of said supports, one or'more profiles, secured to ysaid members, one or more revolvable s indles, one or more cams on said spindles or'` movin said supports with said members and said proles thereon vertically into operative position in molds of undercut ware, a means, for sliding said members with said .profiles thereon horizontally into operative position in molds of undercut ware,"and a means for returning sald members with'theprofiles thereon to ltheir original position.

2. VIn la pottery formin machine a carrierf for supporting mol s` w1th materlal thereon, oneor more jiggers, situated thereunder, a means for actuating the same, one

or more vertically slidable supports for' profiles, a horizontally slidable member on each of said supports, one or more profiles, secured to said members, one ormore vreone'or more cams on said spindles, for moving said supports with said members and proilesthereon vertically into operative position in molds of. undercut ware,one or more levers, pivotally and slidably connected to said supports and to said members, springs, interacting between to turn the same in a direction to slide said members .with said profiles thereon horizontally into operative position in the'molds of undercut ware, and other cams on said spindles, to turn said' levers in the opposite direction,

-against the force of said springs, to return said members withl said profiles thereon to their original positions.

3. In a pottery .forming machine a carrier, Jfor supporting molds with material thereon,

vunder,a means'for actuating the same, one

one or more jiggers, situated theredeparting from the supports and said levers, A

said members withl vsaid'proiles thereon horizontall into opermembers with said profiles lother cams on said spindles',

`slidably connected to said supports and or more vertically proiiles, a horizontally slidable member on profiles l slidable i `supports for cut ware, one or more levers pivotally and slidably connected to said supports and sald members, springs interacting between said to turn the same in a directionV to slide ative position in molds of'un ercut ware,

other cams on said spindles, to turn said loyers in the opposite direction, against the force of said springs, to return said thereon to their original position, and a means for adjusting the resilience'of said springs.

4. In a pottery forming machine a `car.- rier, for supporting molds with material thereon, one orl more vjiggers, situated thereunder, a means for actuating the same, one or more vertically vslidable supports for profiles, a horizontally slidable memberon each of said supports, one or more profiles secured to said members, one or more revolvable spindles, one or more cams on said spindles, for moving said supports with said members and profiles thereon vertically v into operative position in molds of undercut ware, one or more ably connected to' said supports and said members, springs interacting between said supports and said levers, to turnthe same in a direction to slide said members with said profiles thereon horizontally into operative position in molds of undercut ware, to turn said levers in the opposite direction, against the force of said springs, to returnsaid members with said profiles thereon to theirv original positions, and screws, engaged in said supports, for adjusting the resilience of said springs.

5. In a pottery forming machine a carrier, l:for supporting molds with material thereon, one or more jiggers situated thereunder, a means for actuating the same, one or more vertically slidable supports for profiles, a horizontally slidable member on each of said supports, one or more profiles secured to said member, one or more revolvable spindles, one or more cams on said spindles, Jfor moving said .supports with said members and profiles thereon vertically levers, pivotally and slidinto operative position in molds of undercut ware, one or more levers pivotally and said members, compresslon springs interactlng between said supports and said levers, to-

turn the same in a direction to slide said members with the profiles thereon horizontall into operative position in molds of un ercut ware, other cams on said spindles, to turn said levers inthe opposite direction, against the pressure of said sprin to return said members with said profi es thereon to their original positions, screws, engaged in said supports, and abutting plates i on said screws,'in contact with the ends of said s rings, which react on said supports, 10 for a justmg the resilience of said springs.

6. -In a pottery forming machine a carrier for supporting molds with material thereon, one or more jiggers, situated thereunder, a lneans foractuating the same, one

ormore vertically slidable supports for profiles, a horizontally slidable member on each of said supports, one or more profiles, secured to said members, a means for moving said supports with' said members and profiles lthereon vertically into operative posi-l tion, a means for sliding said member with said profiles thereon horizontally into operative position in molds of undercut Ware, a means for returning said members `With the 2'5prof`1les thereon to their ori inal' position, and lugs on said supports, or detachably connnecting thereto proles for acting on non-undercut ware simultaneously with said first mentioned profiles.

"7. In a pottery forming machine a carrier, for supporting molds with material thereon, one or more jiggers, situated thereunder, a means for actuating the same, one or more vertically slidable supports for proliles, a horizontally slidable member on each o'f said supports, one or more profiles, se-

cured to said members, 011e or more revolvable spindles, Vone or more `cams on said spindles, forl moving said supports With said members and said profiles thereon vertically into operative position in molds of undercut Ware, a means for sliding said members with said profiles thereon horizontally into operative position` in molds of undercut ware, a means for returning said members with the profiles thereon to their original position, and a means for limiting the stroke of said members on said supports, when said members are slid thereon into operative position.

8. In a pottery forming machine a car` rier, for supporting molds with material thereon, one or more jiggers, situated thereunder, a means for actuating the same, one or more vertically slidable supports for proles, a horizontally. slidable member on each of said supports, one or more profiles, secured to said members, one or more revolvable spindles, one or more cams on said spindles, for moving said supports with said members and said profiles thereon vertically into operative position in molds of under- .cut ware, a means for sliding said members with said profiles thereon horizontally into operative position molds of undercut ware, a means for returning said members with the profiles thereon to their original position,'a meansfor limiting' the stroke otV said members on saidk supports, when said members are slid thereon into operative position, and a means for varying and adjusting the position of said limiting means, thereby varying and adjusting the ength of said stroke.

9.' In a pottery forming machine a carrier, for supporting molds with the material thereon, one or more jiggers, situated thereunder, a means for actuating the same, one

or more vertically slidable supports for pro-- Apositiomone or more spurs on said memers and screws therein to be intercepted by said supports, for limiting and adjusting the stroke of said members on when said members are slid operative position.

- thereon into vably'con'nected to said supports and tosaid members, springs, .interacting betvveel said supports and said levers, to turn the same in a direction ,to slide said members with said profiles 'thereon horizontally into operative position in the molds of undercut Ware,

other cams on said spindles, to turn said levers in the opposite directiomagainst the 1 return said members W1th' said profiles thereon to their ori-4 force of said springs, to

ginal positions, and a means for varying and adjusting the operating length' of* said said supports f In a pottery forming machine aear- 121er, for supporting molds with material` llO levers, thereby varying and adjusting the stroke of said members with said profiles thereon.

11.. In a pottery forming machine a turntable for carrying molds With material thereon, one or more feeders and preformers, positioned over some of said molds, to feed thereunto and preform a charge of material, one or more jiggers, situated under other of said molds, one or more profiles, positioned over said turntable opposite said jiggers, a means for imparting an intermit-v tent angular motion to said turntable, said means gradually to accelerate and gradually to retard said turntable, to move said molds horizontally into position over said jiggers, to be raised by the latter into operative position under said profiles and rotated thereunder, to have said material shaped thereby, a means 4for reciprocating said jiggers, a means for transmitting motion from said reciprocating means to said imparting means and said profiles, a means for transmitting motion from said profiles to said feeders and preformers, thereby synchronizing the said motions With the reciprocation of said jiggers.

12.v In a pottery forming machine, a main stationary frame comprising vertical sus- `tools secured to said supplemental frame units, cam means for reciprocating said lunits to thereby actuate said shaping tools,

and means for adjusting, While in operation, the reciprocation of said units.

14. In a pottery forming machine, a main stationary frame comprising vertical suspension members, 'vertically reciprocable `supplemental frame units mounted on said suspension members and laterally reciprocable members mounted on said suplementall units, shaping tools secured on said slide bars, and cam-means for reciprocating said units and slide bars to thereby actuate said shaping tools. 15. In a pottery forming machine, a main stationary frame comprising vertical suspension members, `vertically 'reciprocable supplemental frame units slidably mounted on said suspension members and laterally reclprocable slide bars mounted on said units, shaping tools secured on said units and slide bars, cam means for reciprocating said units and slide bars, and means for adjusting, while in operation, the reciprocation of said units and slide bars to thereby adjust the extent of movement imparted to said tools. 16. In a pottery forming machine, a main stationary frame `comprising vertical suspension members, reciprocably mounted shaping-tool-sup porting units slidably mounted on said suspension member, a rotatable mold carrier, a plurality of molds thereon,

reciprocable and rotatable chucks, and a common drive means adapted to impart an intermittent, gradually accelerated and retarded angular motion to said carrier and reciprocate said units and said chucks and also rotate the latter,

to bring said moldsand said shaping tools into operative relation.

17. In a pottery'forming machine, a main stationary lfra-mc comprising vertical sus-l` pension members, reciprocably mounted shaping-tool-supporting units slidably mounted on said suspension members, arotatable moldcarrler, reclprocable and rotatable chucks, a series of feeding units`alsosupported by saidmainwframe, and a common drive means 'for reciprocating said units and said chucks and rotating the latter and also for actuating said feeding units, said drive means being adapted to impart an intermittent, gradually accelerated and retarded angular motion to said mold carrier.

g "WILLIAM J MILLER. 

